R4RIN – MCQs, Mock Tests | ICSE XII MCQ Questions for Class 12 Biology Set 7

Avicennia, Rhizophora andAtriplex are:

1. Xerophytes
2. Halophytes
3. Hydrophytes
4. Mesophytes

✅ Correct Answer: 2

Maximum amounts of humus occurs on:

1. In lower most layer
2. In upper layer
3. In Middle layer
4. Same everywhere

✅ Correct Answer: 2

Mycorrhiza is an example to:

1. Decomposers
2. Endoparasitism
3. Symbiotic relationship
4. Ectoparasitism

✅ Correct Answer: 3

Plants growing in saline soil with high salt concentration are:

1. Xerophytes
2. Halophytes
3. Heliophytes
4. Hydrophytes

✅ Correct Answer: 2

When births are equal to deaths, it is:

1. Plateau stage
2. Exponential stage
3. Early growth stage
4. Acceleration stage

✅ Correct Answer: 1

Which plants is found in mangroove zone?

1. Rhizophora
2. Acacia
3. Pinus
4. Tectona grandis

✅ Correct Answer: 1

Soil transported by air is:

1. Alluvial
2. Glacial
3. Colluvial
4. (Eolian

✅ Correct Answer: 4

Who introduced term Ecosystem?

1. Leaneous
2. Reiter
3. Odum
4. Aristle

✅ Correct Answer: 2

Soil developed from sedimented rock:

1. Force Science
2. Edaphology
3. Pedogenesis
4. All of these

✅ Correct Answer: 3

Best soil for plant growth is:

1. Grit
2. Sandy
3. Soily
4. Clay

✅ Correct Answer: 4

Soil particle determine the character of:

1. Organisation
2. Biomass
3. Area capacity
4. Soil plants

✅ Correct Answer: 1

Plant roots soil water is:

1. Cellular water
2. Surface water
3. Humidity water
4. Gravitational water

✅ Correct Answer: 4

Exchange of water in submerged plant:

1. Stomata
2. Normal surface
3. Hydathode
4. Lenticel

✅ Correct Answer: 2

Submerged Rooted Hydrophyte are:

1. Uticularia
2. Prapa
3. Nymphea
4. Vallisnaria

✅ Correct Answer: 4

Water co-deficient contains:

1. Large thin walled cells
2. Large-vacuoles
3. Membrane
4. All of these

✅ Correct Answer: 3

Xerophyte Contains:

1. Deep roots
2. Sunken stomata
3. Thick cuticle
4. All of these

✅ Correct Answer: 4

Small extremite animals of tropicalregion:

1. Allen’s law
2. Bergmen’s law
3. Dollo’s law
4. Cope’s law

✅ Correct Answer: 4

Hibernation of some animals:

1. Regular
2. Periodic
3. Suddenly
4. Temporary

✅ Correct Answer: 1

Physical and chemical properties of soil studied by :

1. Climatic factor
2. Biotic factor
3. Soil factor
4. Topographic factor

✅ Correct Answer: 2

Identity the Hetero Organism:

1. Pistia
2. Hydrilla
3. Vallisnaria
4. Casurina

✅ Correct Answer: 3

That animal who can bear one third loss of water of one third body weight is:

1. Necturus
2. Camel
3. Wall Lizzard
4. Kyton

✅ Correct Answer: 2

Root hair absent in:

1. Hydrophyte
2. Halophyte
3. Mesophyte
4. Heliophyte

✅ Correct Answer: 1

A water co-efficient Mesophyte is:

1. Cappais
2. Agave
3. Acacia
4. Hemeris

✅ Correct Answer: 2

Gravitated carried soil is:

1. Alluvial
2. Muddy
3. Glacier
4. Compound

✅ Correct Answer: 4

Kanha National Park is famous for:

1. For Birds
2. For Tendua
3. For Tiger
4. For Crocodile

✅ Correct Answer: 2

During food chain the maximum energy is stored in :

1. Producers
2. Decomposers
3. Herbivoures
4. Camivourse

✅ Correct Answer: 1

The average efficiency of energy transfer from herbivoure to carnivorce level is :

1. 5%
2. 10%
3. 20%
4. 30%

✅ Correct Answer: 2

Ecological pyramids were first devised by:

1. Charles Eltom
2. R. Hesse
3. R.A. Lindemann
4. Justus von Liebig

✅ Correct Answer: 1

Which of the following ecosystem has highest gross primary productivity:

1. Grassland
2. Coral reefs
3. Mangrooves
4. Rainforests

✅ Correct Answer: 2

In the phosphorus cycle, weathring makes phosophate available first to:

1. Producers
2. Decomposers
3. Consumers
4. None of these

✅ Correct Answer: 1

Which types of the following pyramid are never inverted?

1. Pyramid of energy
2. Pyramid of biomass
3. Pyramid of number
4. Pyramid of dry biomass

✅ Correct Answer: 1

Biosphere means:

1. Atmosphere
2. Lithosphere and ionosphered
3. Atmosphere, lithosphere and hydrosphere
4. Hydrosphere lithosphere and ionsophere

✅ Correct Answer: 3

Best type of pyramid which is always true is:

1. Pyramid or energy
2. Pyramid of Biomass
3. Pyramid of number
4. Both (a) and (c)

✅ Correct Answer: 1

Decomposers are:

1. Autotrophs
2. Autohetrotrophs
3. Organotrophs
4. Heterotrophs

✅ Correct Answer: 4

The largest ecosystem is :

1. Forest ecosystem
2. Marine ecosystem
3. Pond ecosystem
4. Grassland ecosystem

✅ Correct Answer: 2

More than 70 of world freshwater is contain in:

1. Antarctica
2. Glaciers and mountains
3. Greenland
4. Polar ice

✅ Correct Answer: 3

Which one of the following pair is mismatched?

1. Prairies-Epiphytes
2. Tundra-Permafrost
3. Savannaha-Acacia trees
4. Coniferous forests-Evergreen trees)

✅ Correct Answer: 1

Which of the following is the most stable ecosystem?

1. Mountain
2. Desert
3. Forest
4. Ocean

✅ Correct Answer: 2

Primary succession occurs in :

1. Primary succession occurs
2. Previously unoccupied area
3. Both of the above
4. None of these

✅ Correct Answer: 2

Which one of the following is not used for construction of ecological pyramid?

1. Dry weight
2. Number of individuals
3. Rate of energy flow
4. Fresh weight

✅ Correct Answer: 1

What is the main cause of extinction of some species in tropical forests?

1. Deforestation
2. Afforestation
3. Pollution
4. Soil erosion

✅ Correct Answer: 1

Ecology deals with:

1. The arth and plants
2. The relationship between organisms and their environment
3. Economical growth of poor people
4. The life under sea

✅ Correct Answer: 2

Shola forests are found in :

1. Eastern Coast of Orissa
2. North East Himalayas
3. Western Ghats (Kerala)
4. Decian Plateau

✅ Correct Answer: 3

Lion-tailed Macaque is found in:

1. Western Ghats
2. Caucasus
3. Eastern Ghats
4. Western Himalaya

✅ Correct Answer: 1

Project tiger in India was started in the year:

1. 1973
2. 1981
3. 1985
4. 1986

✅ Correct Answer: 1

Dudhwa National Part is located in:

1. In Himachal Pradesh
2. In Uttar Pradesh
3. In Madhya Pradesh
4. Arunachal Pradesh

✅ Correct Answer: 2

Which type of living organisms given below are listed in Red Data Book”?

1. Rare species
2. Rare and endangered species
3. Endangered species
4. None of these

✅ Correct Answer: 2

Reserve biosphere of Sundarban is situated in which of the following states :

1. Bihar
2. Uttar Pradesh
3. Assam
4. West Bengal

✅ Correct Answer: 4

Biodiversity Act of India was passed by the Parliament in the year:

1. 1996
2. 1992
3. 2002
4. 2000

✅ Correct Answer: 3

Red Data Book is produced by:

1. IUCN
2. WWF
3. IBWL
4. None of these

✅ Correct Answer: 1